# The Dot-Com Bubble

> The dot com bubble saw internet stocks soar in the late 1990s and the Nasdaq lose about 78% by 2002. Learn the causes, warning signs and lessons for investors.

Source: https://learn.tradelabsai.com/history/the-dot-com-bubble/  
Track: Market History · Level: Beginner · Updated: 2026-10-03  
Publisher: TradeLabs AI (https://tradelabsai.com). Education, not financial advice.  
Cite as: TradeLabs Learn, "The Dot-Com Bubble", https://learn.tradelabsai.com/history/the-dot-com-bubble/

In the late 1990s, excitement about the internet sent technology stocks to extraordinary valuations. Companies with little revenue and no profits went public and doubled on their first day. The Nasdaq Composite, home to many technology stocks, rose about fivefold in five years, peaking in March 2000. Over the next two and a half years it fell about 78%, wiping out trillions of dollars of market value. The internet did change the world, but most dot com companies did not survive, and investors learned again that a great technology is not the same as a great investment at any price.

## Timeline

| Date | Event |
|---|---|
| 1995 | Netscape's IPO soars, signalling investor appetite for internet companies. See [IPOs](https://learn.tradelabsai.com/fundamentals/ipos/) |
| 1996 | Fed chair Alan Greenspan warns of "irrational exuberance" |
| 1998 to 1999 | Internet IPOs surge; many double or more on their first trading day |
| 10 March 2000 | The Nasdaq Composite closes at a peak of 5,048.62 |
| 2000 to 2001 | Funding dries up; many dot coms fail, including Pets.com |
| 2001 | Recession; the September 11 attacks deepen the decline |
| 9 October 2002 | The Nasdaq bottoms at 1,114.11, about 78% below its peak |
| April 2015 | The Nasdaq Composite surpasses its 2000 high |

## Causes

| Factor | Explanation |
|---|---|
| New technology narrative | Belief that the internet made traditional valuation obsolete |
| Easy capital | Venture capital and IPO markets funded unprofitable companies |
| Valuation metrics abandoned | Investors focused on "eyeballs" and page views instead of earnings. See [Valuation Basics](https://learn.tradelabsai.com/fundamentals/valuation-basics/) |
| Retail participation | Online brokers and day trading brought in new investors |
| Fear of missing out | Rising prices drew in more buyers. See [FOMO](https://learn.tradelabsai.com/psychology/fomo/) |
| Monetary conditions | Liquidity was ample, and the Fed later raised rates in 1999 to 2000 |

## Valuations at the peak

Many leading technology stocks traded at price to earnings ratios above 100, and some companies with no earnings were valued in the billions. The S&P 500's cyclically adjusted price to earnings ratio reached its highest level on record, above its 1929 peak. See [P/E and Forward P/E](https://learn.tradelabsai.com/fundamentals/p-e-and-forward-p-e/).

**Example: The cost of buying at the peak**
An investor puts $10,000 into a Nasdaq Composite index tracker at the March 2000 peak. By October 2002, it is worth about $2,200, a 78% loss. To get back to $10,000 requires a gain of about 350%. In price terms, the index did not regain its peak until 2015, about 15 years later. An investor who bought a basket of the most speculative dot com stocks fared worse, since many went to zero. See [Maximum Drawdown](https://learn.tradelabsai.com/portfolio/maximum-drawdown/) and [Drawdown Recovery Calculator](https://learn.tradelabsai.com/tools/drawdown-recovery-calculator/).

## Winners and losers

Some companies founded or growing in the period, such as Amazon, survived and became giants, though Amazon's stock itself fell more than 90% from its 1999 peak to its 2001 low. Many others, such as Pets.com, Webvan and eToys, went bankrupt. Telecom companies that borrowed heavily to build networks also collapsed, and accounting scandals such as Enron and WorldCom emerged as the boom ended, leading to the Sarbanes Oxley Act of 2002. See [Earnings Quality and Cash Conversion](https://learn.tradelabsai.com/fundamentals/earnings-quality/).

## Warning signs

1. **Valuations justified by "this time is different"** rather than cash flows. See [DCF Valuation](https://learn.tradelabsai.com/fundamentals/dcf-valuation/).
2. **Profitless companies** with soaring share prices.
3. **Record IPO activity** and huge first day gains.
4. **Widespread retail speculation** and stories of easy riches.
5. **Rising rates** after a long period of easy money.

## Lessons for investors

- **Price matters:** a good business can be a bad investment at too high a price.
- **Survivorship bias:** remembering Amazon hides the hundreds of failures. See [Survivorship and Selection Bias](https://learn.tradelabsai.com/research/survivorship-and-selection-bias/).
- **Diversify:** concentrated technology portfolios suffered the most. See [Concentration Risk](https://learn.tradelabsai.com/risk/concentration-risk/).
- **Be wary of narratives:** recent gains make extrapolation tempting. See [Recency Bias](https://learn.tradelabsai.com/psychology/recency-bias/).
- **Drawdowns can last years,** so position size and time horizon matter. See [Position Sizing](https://learn.tradelabsai.com/risk/position-sizing/).

## Frequently asked questions

### What was the dot com bubble?

A speculative boom in internet related stocks in the late 1990s, followed by a crash from 2000 to 2002 in which the Nasdaq lost about 78%.

### What caused the dot com crash?

Extreme valuations, profitless companies running out of funding, rising interest rates and a recession ended the boom.

### How long did the Nasdaq take to recover?

The Nasdaq Composite did not surpass its March 2000 peak until April 2015, about 15 years later.

Next, learn about the worst financial crisis since the Depression in [The 2008 Financial Crisis](https://learn.tradelabsai.com/history/the-2008-financial-crisis/).

## Continue learning

- Next lesson: [The 2008 Financial Crisis](https://learn.tradelabsai.com/history/the-2008-financial-crisis/)
- Previous lesson: [Black Monday 1987](https://learn.tradelabsai.com/history/black-monday-1987/)
- Related: [Black Monday 1987](https://learn.tradelabsai.com/history/black-monday-1987/): On 19 October 1987 the Dow fell 22.6% in a single day. Learn what caused Black Monday, the role of portfolio insurance, the Fed's response and its lasting legacy.
- Related: [Valuation Basics](https://learn.tradelabsai.com/fundamentals/valuation-basics/): Valuation estimates what a business is worth. Learn intrinsic vs relative valuation, the main multiples, how growth and risk affect value and common mistakes.
- Related: [P/E and Forward P/E](https://learn.tradelabsai.com/fundamentals/p-e-and-forward-p-e/): The P/E ratio compares a stock's price with its earnings. Learn trailing vs forward P/E, earnings yield, what high or low P/E means and the ratio's limits.
- Related: [IPOs](https://learn.tradelabsai.com/fundamentals/ipos/): An IPO is when a private company first sells shares to the public. Learn the process, pricing, first day pops, lockups, direct listings and SPACs.
- Related: [Maximum Drawdown](https://learn.tradelabsai.com/portfolio/maximum-drawdown/): Maximum drawdown measures the largest fall from a peak to a trough in an account or strategy. Learn how to calculate it, recovery maths, duration and how to use it.
- Related: [Recency Bias](https://learn.tradelabsai.com/psychology/recency-bias/): Recency bias makes recent events feel more important than they are. Learn how it distorts strategy judgement, risk and market views, and how to counter it.